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MSP430FR2110: Error Connecting to the target: Unknown device

Ajay Khedekar
Prodigy 250 points
Part Number: MSP430FR2110
Other Parts Discussed in Thread: MSP430FR4133

Hello, 

I am trying to debug  the port pin toggling program to MSP430FR2110 with using MSP-FETFlash Emulation tool. firstly i have connected this controller to FET using 4 wire connection as suggested in hardware tool with eternal power supply on pin no 4 of FET .i have checked JTAG connections connectivity twice . But when i tried to debug fresh controller using CCS V7  i have got error specifying that "Error Connecting to the target: Unknown device". then i have tried with various combinations after checking every time JTAG connection are following

1) i have tried with various capacitor on Reset pin 10nF,47pF and 1nF with Fixed resistor as 47Kohms

2) tried with 2 wire debugging specified for MSP430FR series (NC to Test pin of FET tht is 8 No pin) with external power and FET power.

3)Tried with power up controller from FET(from 2nd no pin)

4) changing USB port of computor

5)Tried with soldering  controller on breakout board and tested on Breadboard

6) tried debug my controllers using of Emulator(eZ-FET V1.2) of MSP430FR4133 launchpad

7) also tried on CCS V6.2 

8) updating CCS and FET

when i am trying to use 2 wire connection on MSP430FR4133  launch pad using external FET its work fine only with FET power mode not in external power mode, as i saw in launchpad circuit it have 47K with 1nF on RST pin trying with same value on MSP430FR2110 its showing same error . also MSP43FR4133 will not working on 4 wire mode.

I have tried  on another MSP430FR4133  own designed board its worked only once for 2 wire mode and 4 wire mod with FET power but when i am tried 2nd time its not working showing same error.

now the condition is i can  not debug MSP430FR2110 Nor MSP430FR4133(my own board).

Please suggest how to proceed? also i will tried to find out solutions from my side.

i have not connected any component other than decoupling capacitor between DVCC an DVSS 

 

  • 0
    TI__Guru 66046 points
    Hi Ajay,

    According to your schematic, you have the RESET button wired incorrectly. The RST signal from your programming connector should connect to the node between the pullup resistor and cap, then also to the RST pin on the MSP. Additionally, wire one side of the switch to RST and the other to ground. As you have it now, the RST node is not connected to the resistor and cap.
  • 0 in reply to Dennis Lehman
    Prodigy 250 points

    Hello Dennis, 

    thank you for your response.

    actually this schematic diagram is correct but problem is with symbol used in the schematic. In circuit i have used 4 pin push button  which have 1 and 2 pin are internally shorted and 3 and 4 pin are internally shorted. when button is pushed all pin are connected and when open 1 and 2  are isolated from 3 and 4 pin. for 2 pin push button you can assume 1 pin is (1 and 2 shorted together for 4 pin  button ) and 2 pin is (3 and 4 are shorted together of 4 pin connector) .

    reset switch which is used in my schematic  as 1 and 2 pin are shorted so pull resistor and capacitor will automatically appear and RST pin of micro controller as well as JATG connector. 

    and when button is press RST pin connected to ground.

  • 0 in reply to Ajay Khedekar
    TI__Guru 66046 points
    Hi Ajay,

    Ok, let's focus on your PCB with the FR4133 ( I believe that is schematic you show above). Can you measure the VCC voltage on the FR4133?
    Also, do you have a oscilloscope or logic probe that you can connect to the RST/TST pins?
  • 0 in reply to Dennis Lehman
    Prodigy 250 points

    Hello Dennis Lehman,

    I am giving power to MSP430FR4133 form MSP FETFlash emulation tool and i have checked on pin using DMM is 3.33V. Also i am sharing RST pin snapshot from DSO. i am putting DSO on single shot and pressing debug button of CCS  and this wave form are appears and gain i am putting on single shot and pressing Run button on CCS (green arrow) then nothing is appear on DSO.

    Currently my controller is ( PCB of MSP430FR4133 ) is working fine.i have tried 3-4 time debug to controller its working. before while facing this problem with MSP430FR4133 PCB i have tried Spy-Bi-Wire mode once its work and after i have tried 4 wire JTAG. but its gives problem on JTAG debugging. but after 2-3 hour its work. after this que. posted while searching and reading i got some information that Spy-Bi-Wire will unstable the internal crystal. after that i haven't tried on Spy-Bi-Wire and working with only 4 pin JTAG with MSP FET and its working.

    same suggestion of power and RST i have checked with MSP430FR2110  its show 3.33V from MSP FET to MSP430FR2110 and RST pin waveform are attached. its still not working giving same error.

  • 0 in reply to Ajay Khedekar
    TI__Guru 66046 points
    Hi Ajay,

    Can you provide me a link where you read about spy-by-wire and unstable internal crystal?
    Sound it sounds like you have your circuit working with onl the 4-wire JTAG for now, is this correct? If so, what did you change in your setup or wiring to allow it work now?
  • 0 in reply to Dennis Lehman
    Prodigy 250 points

    Dear Dennis Lehman,

    yes, MSP430FR4133 board are working with only 4-wire JTAG for (i have not tried spy-by-wire mode after board working with 4 wire JTAG). i have  not changed in any thing in circuit only thing is i have power off board around 2 hours after this problem occur and then tried with JTAG.

    but condition is now is MSP430FR4133 is working fine with 4 wire JTAG mode and still MSP430FR2110 is not working any more.

     2 nd image in above reply is RST in of MSP430FR2110. and its still giving error while debug.

     sorry, i am finding that document where read about spy-by-wire and unstable crystal. i will paste it when i got it.

  • 0 in reply to Ajay Khedekar
    TI__Guru 66046 points
    Hi Ajay,

    Ok, looking back at the photos you provided, if the first picture is the FR4133 and the second picture is the FR2110, then if you compare the two pictures there appears to be something wrong with the RST node (wiring) on the FR2110 RST pin. Are you sure the layout is correct and you don't have any other devices or components, other than a pullup resistor can capacitor connected to the RST pin? This signal should be swinging between 0v and 3.3v and is clearly not.
  • 0 in reply to Dennis Lehman
    Prodigy 250 points

    Hi Dennis Lehman ,

    after reading your reply i had checked my board again my borad layout and itf correct.

    But still not trusting on board i am working on breackout board( which contain only controller) and breadbord. Connections are follow

    JATG pin configuration              FR2110 configuration

    TDO (1)                     TDO(11)

    TDI (3)                       TDI(12)

    TMS (5)                    TMS(13)

    TCK(7)                    TCK(14)

    GND(9)                   DVSS(6)

    RST(11)                    RST(4)

    TEST(8)                   TEST(3)
    VCC_Tool(2)           DVCC(5)

    DVCC have 2 parallel capacitor of 1uF (electrolyte) and 0.1uF of (ceramic) wit respect to DVSS

    and pull up resistor of 47K ohms(one terminal to 3.3V and another to RST pin) and connected to 1nF capacitor(one terminal to RST pin and another to GNG)(common point between resistor and capacitor is shorted to RST oF JATG and FR2110(JTAG RST-->common node of res-cap-->FR2110 RST))

    with this configration i have debug the controller after last switching of RST pin shown in waveform the pop up window is appear on CCS screen showing Error Connecting to the target: Unknown device massage on window

    i ahve tried with same configation by changing power setting instead of giving power from MSP flash tool i have power device and MSP flash tool( at pin 4) from external power supply. In the overall testing the power is constant 3.3VDC (from MSP Flash tool ( 3.33V)

    i am attaching the image of setup and waveform of RST pin appeared on DSO



  • 0 in reply to Ajay Khedekar
    TI__Guru 66046 points
    Hi Ajay,

    I would not use the 4-wire JTAG connections. The spy-by-wire will work just as well and will not eat up the other IO pins.
    Remove the flat ribbon cable from the MSPFET and connect the wires from your bread board directly to the MSPFET. This shortens the signal paths and reduces any parasitic capacitances.

    MSPFET pin 1 to FR2110 RST/SBWTDIO
    MSPFET pin 7 to FR2110 TCK/SBWTCK
    MSPFET pin 2 to FR2110 VCC
    MSPFET pin 9 to FR2110 GND

    This works for me here on the bench.
    If still not working for you then either your device is damaged or there is something still fishy about your wiring.
  • 0 in reply to Dennis Lehman
    TI__Guru 66046 points
    Hi Ajay,

    I'm going to close this thread since it has been a few days since your last response and I'm assuming you have resolved your issue.
    If this is not the case and you need additional help, you can re-open this same thread.

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